Sources

found: Becker, D. Musicalische Frühlings-Früchte, 1995:t.p. (Diederich Becker) p. vii (first name almost always spelled Diedrich (1 time, Dieterich) in published works, but Diederich in mss.; last name generally spelled Becker in mss., also appears as Bekker or Baekker in contemporary documents)